Propeller fan



FIG. 1 is a front, bottom and right side perspective view of a propeller fan, showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a left view thereof;

FIG. 7 is a right view thereof; and,

FIG. 8 is an enlarged partial view of the area indicated in FIG. 1.

The portions shown in light grey in the drawings illustrate portions of the propeller fan that form no part of the claimed design. 

CLAIM The ornamental design for a propeller fan, as shown and described. 